9902.08.90 - Yttrium oxide phosphor doped by europium, of a kind used as a luminophore. (CAS No. 68585-82-0) (provided for in subheading 3206.50.00)

This HTS classification, 9902.08.90, pertains to specific yttrium oxide phosphors doped with europium, designated for use as luminophores. These materials are characterized by their ability to emit light when excited by other forms of energy, a critical property for applications in lighting, displays, and other phosphorescent technologies. The inclusion of the CAS number 68585-82-0 further refines the scope of this entry, ensuring precise identification of the chemical compound.

Given that this is a leaf node, there are no subcategories to explore. Instead, understanding the context provided by its parent, Chapter 99 of the Harmonized Tariff Schedule, is crucial. Chapter 99 generally encompasses temporary legislation, trade agreement modifications, and specific import restrictions. Therefore, goods classified under 9902.08.90 are subject to these overarching provisions, which may include quotas, special duties, or specific documentation requirements beyond the standard classification.

The distinction between this specific provision and other categories within the HTS lies in its specialized nature and its placement within Chapter 99. While other chapters might cover general chemical compounds or finished goods utilizing phosphorescent materials, 9902.08.90 isolates this particular doped yttrium oxide for specific tariff or regulatory treatment. The reference to subheading 3206.50.00 indicates that, in the absence of these specific Chapter 99 provisions, the merchandise would typically fall under the broader category for inorganic pigments and preparations.